While Henry Winkler and Ron Howard portrayed friends on Happy Days, it wasn’t always so happy off the set of the show. As Winkler’s character Fonzie rose in popularity, Howard felt a little left out as his character Richie Cunningham was supposed to be the main character of the show. Winkler is opening up about how the sitcom tested their friendship in his new memoir called Being Henry: The Fonz… and Beyond.